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Cover Picture
Chandrakala Pidathala, Linh Hoang, Nicola Vignola, and
Benjamin List*
A feather in the cap of the aldol reaction. The cover picture shows the amino acid
(S)-proline surrounded by some new catalytic asymmetric intramolecular
aldolizations, which are described by B. List et al. on page 2785 ff. Another example
of the ever-increasing number of proline-catalyzed reactions are enolexo aldolizations.
Despite these exciting discoveries, it is often forgotten that almost half of the
250 tonnes of proline produced each year is isolated from chicken feathers!